671 area code: location, time zone and numbers
In Guam, 671 is a US telephone area code that has been in service since 1997.
- Location
- Every part of Guam
- Service start
- 1997
- Local time zone
- Chamorro (UTC+10)
- Overlay
- None: the sole code for its area
- Calls in the area
- Full 10-digit dialling
- Expected exhaustion
- Over 100 years away
- Country calling prefix
- +1 (United States)
File of 11/01/2026: NANPA public reports, including the area code report and the rate-centre report; the exhaust year comes from the NANPA projections 2026-1, dated April 2026. We are not an official NANPA site.
Get your own 671 number
You can get a 671 number in two ways. During sign-up, a provider gives you a new number with its plan from the numbers it holds for the code. Sellers advertise numbers they already hold, often with a pattern, at a one-time price. After that, you move the number to a provider.
Providers, ranked by first-year cost
| Provider | Cheapest plan | First year | Link |
|---|---|---|---|
 Free app | Basic (Just for me), free | $0 | Open Google Voice |
 Free app | Free plan, free | $0 | Open TextNow |
 Developer API | Pay-as-you-go local number, $1.15 a month | $13.80 | Open Twilio |
 Second-number app | Standard, $3.99 a month billed yearly | $47.99 | Open Burner |
 Toll-free specialist | Solo, $6.99 a month billed yearly | $84 | Open UniTel Voice |
 Second-number app | Deluxe (local number), $6.99 a month billed yearly | $102.88 | Open GoDaddy Conversations (formerly Smartline) |
Sellers that list local numbers
| Seller | What it sells | Listed price | Monthly fee | Link |
|---|---|---|---|---|
 Marketplace | Local numbers | From $9 one-time | None stated | Search at Exclusive Digits |
 Marketplace | Local and toll-free | From $9.95 one-time | $2.99 a month | Search at NumberBarn |
 Number broker | Local and toll-free | From $99 one-time | None stated | Search at RingBoost |
 Number broker | Local and toll-free | From $100 one-time | None stated | Search at PhoneNumberExpert |
| 212areacode.comNumber broker | Local numbers | From $150 one-time | None stated | Search at 212areacode.com |
Some sellers and providers may pay us a referral fee. The referral fee does not affect our order, which depends on cost during the first year. How we earn
671 area code questions
Where does area code 671 serve?
Calls with 671 ring in Guam.
Which country code does a 671 number use?
+1. As part of the North American Numbering Plan, 671 means that from abroad you dial +1 671 and then the 7-digit number.
What time is it in the 671 area code?
The time zone for 671 is Chamorro (UTC+10).
Who calls using a 671 number?
People who fake a local number also fit here, along with homes, mobiles and local businesses: anyone with a number in this code. A 671 number on your screen shows where the number was assigned. It does not tell you who is calling.